Device for automatically pressing multiple springs to control pre-tightening force

Abstract

The utility model discloses an automatic multi-spring pressing pre-tightening force control device which comprises a hydraulic stacker, a main oil cylinder, an auxiliary oil cylinder, a displacement detection device, a guide rod, an electric pile lower nut, a jig connecting plate, an oil cylinder connecting plate, a force measuring sensor, a special spring pressing jig, an electric pile screw rod, an electric pile spring and a mounting frame, the auxiliary oil cylinder is installed at the top of the hydraulic stacker in a penetrating mode, the oil cylinder connecting plate is in rigid connection with the auxiliary oil cylinder through screws, the jig connecting plate is installed in the hydraulic stacker in a sliding mode and located below the oil cylinder connecting plate, and the displacement detecting device is connected to the top of the jig connecting plate through parts. The screw pre-tightening device can automatically stop and maintain the pressure after reaching the set pressure, the pre-tightening force can be adjusted only by automatically pre-pressing the screw on the galvanic pile, meanwhile, the data of the force and the data of the stroke can be compared with each other, defective products are prevented, and the screw pre-tightening device is convenient to use and high in practicability.

Description

Technical Field

[0001] The utility model specifically relates to an automatic multi-spring preload control device, belonging to the technical field of pile pressing machines. Background Art

[0002] Generally speaking, a battery stack is a stack of hydrogen fuel cells, electrolyzers, flow batteries and other hydrogen energy-related products. When assembling the battery stack, it must be ensured that each area on the front and rear end plates is subjected to basically consistent and identical fastening forces, so the battery stack needs to be mechanically pressed.

[0003] The existing hydraulic stacking machine piezoelectric stack requires manual or machine tightening of the screws on the stack repeatedly to complete the final tightening. The speed is slow and the accuracy is poor. It cannot automatically stop and maintain the pressure after reaching the set pressure. At the same time, the force data and stroke data are not compared with each other, which easily leads to defective products. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art and to provide an automatic multi-spring preload control device, which can automatically stop and maintain pressure after reaching the set pressure, and the screws on the battery stack only need to be automatically preloaded to solve the size of the preload force. At the same time, the force data and stroke data can be compared with each other to prevent the occurrence of defective products.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme, an automatic multi-spring compression control preload device, including a hydraulic stacking machine, a main oil cylinder, an auxiliary oil cylinder, a displacement detection device, a guide rod, a battery stack lower nut, a fixture connecting plate, an oil cylinder connecting plate, a force sensor, a special fixture for compression springs, a battery stack screw, a battery stack spring and a mounting frame, the main oil cylinder is installed through the top of the hydraulic stacking machine, the auxiliary oil cylinder is installed through the top of the hydraulic stacking machine, and the number of the auxiliary oil cylinders is two.

[0006] Preferably, in order to fix the piston rod of the auxiliary cylinder, the cylinder connecting plate is rigidly connected to the auxiliary cylinder by screws.

[0007] Preferably, in order to measure the displacement of the battery stack, the jig connecting plate is slidably installed inside the hydraulic stacking machine, the jig connecting plate is located below the cylinder connecting plate, and the displacement detection device is connected to the top of the jig connecting plate through parts.

[0008] Preferably, in order to detect the force of pressing down the battery stack, the force sensor is fixed to the jig connecting plate by screws, and the top of the guide rod is fixedly mounted on the top of the jig connecting plate.

[0009] Preferably, in order to pressurize the stack screw, the top of the special jig for the compression spring is fixedly installed on the bottom of the guide rod, and a limiting hole is opened at the bottom of the special jig for the compression spring.

[0010] Preferably, in order to facilitate pressurizing the battery stack spring, the mounting frame is installed inside the hydraulic stacking machine, and the battery stack screw is fixedly installed on the top of the mounting frame, and the battery stack screw corresponds to the position of the limiting hole one by one.

[0011] Preferably, in order to facilitate automatic pressure maintenance of the battery stack, the battery stack spring is fixedly installed at the bottom of the battery stack screw.

[0012] Preferably, in order to fix the pressurized fuel cell stack, the fuel cell stack lower nut is fixedly installed at the bottom of the mounting frame.

[0013] The technical effects and advantages of the utility model are as follows: the utility model installs a battery stack spring on the battery stack screw, which can automatically stop and maintain pressure after reaching the set pressure, so that the equipment has a high degree of automation and the equipment controls the preload force with high precision. The screws on the battery stack only need to be automatically preloaded to solve the size of the preload force. At the same time, the force data and the stroke data can be compared with each other, and can be mutually verified through software algorithms to prevent the occurrence of defective products. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a side view schematic diagram of the overall structure of the utility model;

[0016] Figure 3 It is a schematic cross-sectional view of the overall structure of the utility model;

[0017] Figure 4 It is a schematic top view of the overall structure of the utility model.

[0018] In the figure: 1. Hydraulic stacking machine; 2. Main oil cylinder; 3. Auxiliary oil cylinder; 4. Displacement detection device; 5. Guide rod; 6. Battery stack lower nut; 7. Jig connecting plate; 8. Cylinder connecting plate; 9. Force sensor; 10. Special jig for compression spring; 11. Battery stack screw; 12. Battery stack spring; 13. Mounting frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 As shown, an automatic multi-spring preload control device includes a hydraulic stacking machine 1, a main oil cylinder 2, an auxiliary oil cylinder 3, a displacement detection device 4, a guide rod 5, a battery stack lower nut 6, a fixture connecting plate 7, a cylinder connecting plate 8, a force sensor 9, a special fixture for compression springs 10, a battery stack screw 11, a battery stack spring 12 and a mounting frame 13. The main oil cylinder 2 is installed on the top of the hydraulic stacking machine 1, and the main oil cylinder 2 can press the battery stack. The auxiliary oil cylinder 3 is installed on the top of the hydraulic stacking machine 1. There are two auxiliary oil cylinders 3, and the internal hydraulic oil circuit fluid of the hydraulic stacking machine 1 has also been specially designed to ensure that the two auxiliary oil cylinders 3 are pressed down synchronously.

[0021] The oil cylinder connecting plate 8 is rigidly connected to the auxiliary oil cylinder 3 by screws, and the oil cylinder connecting plate 8 can fix the piston rod of the auxiliary oil cylinder 3. The jig connecting plate 7 is slidably installed inside the hydraulic stacking machine 1, and the jig connecting plate 7 is located below the oil cylinder connecting plate 8. The displacement detection device 4 is connected to the top of the jig connecting plate 7 through parts, and the displacement detection device 4 can detect the formation of downward pressure. The force sensor 9 is fixed to the jig connecting plate 7 by screws, and the top of the guide rod 5 is fixedly installed on the top of the jig connecting plate 7. The guide rod 5 is used to connect the jig connecting plate 7 and the special jig for the compression spring. Tool 10, the top of the special jig 10 for compression spring is fixedly installed on the bottom of the guide rod 5, and a limiting hole is arranged at the bottom of the special jig 10 for compression spring. The mounting frame 13 is installed inside the hydraulic stacking machine 1, and the battery stack screw 11 is fixedly installed on the top of the mounting frame 13. The positions of the battery stack screw 11 and the limiting holes correspond one by one, which is convenient for pressing the battery stack screw 11. The battery stack spring 12 is fixedly installed at the bottom of the battery stack screw 11. The battery stack spring 12 can maintain pressure after being pressed into place, and the battery stack lower nut 6 is fixedly installed at the bottom of the mounting frame 13, which is convenient for fixing the position of the battery stack.

[0022] When the utility model is actually used, the battery stack is pressed and loaded by the main oil cylinder 2 on the hydraulic stacking machine 1. When the main oil cylinder 2 is pressed and loaded downward, the auxiliary oil cylinder 3 moves downward at the same time. The piston rod of the auxiliary oil cylinder 3 is rigidly connected to the cylinder connecting plate 8 by screws, which can drive the cylinder connecting plate 8 to move. The fixture connecting plate 7 is fixed to the special fixture 10 for compression springs by screws through the guide rod 5. The limiting holes set at the bottom of the special fixture 10 for compression springs correspond to the positions of the screw rods 11 for the battery stack, which is convenient for the holes of the special fixture 10 for compression springs to pass through the screw rods to pressurize the springs used on the battery stack, and maintain the pressure after reaching the set required force. The displacement detection device 4 is connected to the fixture connecting plate 7 by parts to detect the pressurization stroke, and the force sensor 9 detects the downward force, which is convenient for comparing the force data and the stroke data, and can be mutually verified through software algorithms to prevent defective products from occurring.

[0023] Only a small amount of force is needed at the lower end to tighten the nuts under the stack using a wrench or an electric tool. The screws on the battery stack only need to be automatically pre-pressed to solve the size of the pre-tightening force. It has fast speed and high precision. It solves the problem that when using the traditional hydraulic stacking machine 1 to press the battery stack, the screws on the battery stack need to be tightened manually or repeatedly by the machine for multiple times to complete the final tightening, which has slow speed and poor precision. Finally, the main and auxiliary cylinders 3 on the hydraulic stacking machine 1 rise, and the battery stack is moved out of the machine through the hydraulic stacking machine 1. The battery stack is manually lifted away by a crane to complete all the processes.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic multi-spring preload control device, comprising a hydraulic stacking machine (1), a main oil cylinder (2), an auxiliary oil cylinder (3), a displacement detection device (4), a guide rod (5), a battery stack lower nut (6), a fixture connecting plate (7), a cylinder connecting plate (8), a force sensor (9), a special fixture for compression springs (10), a battery stack screw (11), a battery stack spring (12) and a mounting frame (13), characterized in that: The main oil cylinder (2) is installed on the top of the hydraulic stacker (1), and the auxiliary oil cylinder (3) is installed on the top of the hydraulic stacker (1). There are two auxiliary oil cylinders (3).

2. The automatic multi-spring preload control device according to claim 1, characterized in that: The oil cylinder connecting plate (8) is rigidly connected to the auxiliary oil cylinder (3) via screws.

3. The automatic multi-spring preload control device according to claim 2, characterized in that: The jig connection plate (7) is slidably mounted inside the hydraulic stacking machine (1); the jig connection plate (7) is located below the oil cylinder connection plate (8); and the displacement detection device (4) is connected to the top of the jig connection plate (7) via parts.

4. The automatic multi-spring preload control device according to claim 3, characterized in that: The force sensor (9) is fixed to the jig connecting plate (7) by means of screws, and the top of the guide rod (5) is fixedly mounted on the top of the jig connecting plate (7).

5. The automatic multi-spring preload control device according to claim 4, characterized in that: The top of the special jig (10) for compression springs is fixedly mounted on the bottom of the guide rod (5), and a limiting hole is provided at the bottom of the special jig (10) for compression springs.

6. The automatic multi-spring preload control device according to claim 1, characterized in that: The mounting frame (13) is mounted inside the hydraulic stacking machine (1), and the stack screw (11) is fixedly mounted on the top of the mounting frame (13), and the stack screw (11) corresponds to the position of the limiting hole one by one.

7. An automatic multi-spring preload control device as claimed in claim 6, characterized in that: The stack spring (12) is fixedly mounted at the bottom of the stack screw (11).

8. The automatic multi-spring preload control device according to claim 1, characterized in that: The stack lower nut (6) is fixedly mounted on the bottom of the mounting frame (13).

Images